[Webkit-unassigned] [Bug 227700] New: Inconsistent 'change' event dispatch on color input

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227700

            Bug ID: 227700
           Summary: Inconsistent 'change' event dispatch on color input
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dan at moqups.com
                CC: cdumez at apple.com, wenson_hsieh at apple.com

Created attachment 432916

  --> https://bugs.webkit.org/attachment.cgi?id=432916&action=review

'input' and 'change' events on <input type=color>

<input type=color/> opens a popup containing color swatches. Clicking on any color swatch produces an `input` event, followed by a `change` event and (crucially) closes the popup. 

The _Show colors..._ button opens up the macOS native color picker. Dragging the cursor around the color wheel produces pairs of `input` and `change` events. I believe `change` event should be reserved to the user committing the value change by dismissing the color picker. This would be consistent with behaviors in both Chrome/macOS and Firefox/macOS. 

Attached for convenience is a simple test case with a color input that logs its `input` and `change` events in the browser console.

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